XML Request Cisco EPC3928 AD

babba · Post by **babba** » Mon Sep 01, 2014 8:06 am

I v got some new modems to play with and i want to dump the firmware ( doh )

I looked on the forum but cant find my anwser

Can somebody create/share/help/edit a XML file for my usbjtag + EPC3928

The EPC3928 is a broadcom powerd modem with a spi flash , 5ghz and 2.4 ghz network running side by side. in my opinion a pretty cool modem .
Olso is there a serial port onboard?

Anny help is welcome , i made olso some pics of inside the modem.

http://i.imgur.com/eipfD48.jpg
http://i.imgur.com/RUyYZwE.jpg
http://i.imgur.com/YTtH386.jpg

thank you

Post by **usbbdm** » Mon Sep 01, 2014 8:56 am

This is another modem with FL256 flash. Tell me if you can read/write this flash or there might be a need to release a newer version to support this flash.

Post by **usbbdm** » Mon Sep 01, 2014 9:06 am

I have ordered FL256 flash from digi-key and will see if there is a need to add additional code to support this chip.
The chip should arrive this week and if you see a new version released then most likely it is to support flash that is larger than 16M.

babba · Post by **babba** » Mon Sep 01, 2014 12:29 pm

usbbdm wrote:I have ordered FL256 flash from digi-key and will see if there is a need to add additional code to support this chip.
The chip should arrive this week and if you see a new version released then most likely it is to support flash that is larger than 16M.

I didnt check it out yet usbbdm , kuz i thought i need a xml to proper rw
Thx alot for yout time.

Post by **usbbdm** » Wed Sep 03, 2014 11:04 am

FL256 chip had arrived. I will take a look today or tomorrow. Should not be a big deal.

babba · Post by **babba** » Thu Sep 04, 2014 8:09 am

usbbdm wrote:FL256 chip had arrived. I will take a look today or tomorrow. Should not be a big deal.

Thx alot

Post by **usbbdm** » Thu Sep 04, 2014 8:37 am

babba wrote:Thx alot

To read the entire flash is not an issue. However to erase and program needs a little bit of work. This flash does not use uniform sector size. I need to adjust the code to work with this chip.

babba · Post by **babba** » Fri Sep 05, 2014 1:50 am

usbbdm wrote:To read the entire flash is not an issue. However to erase and program needs a little bit of work. This flash does not use uniform sector size. I need to adjust the code to work with this chip.

No rush man , already thankfull for the great support .

Post by **usbbdm** » Sun Sep 07, 2014 10:26 am

Erase and read are OK now. However something wrong with the programming and it is still not working yet. I need to find out where is the bug.

Post by **usbbdm** » Sun Sep 07, 2014 10:20 pm

Download 0.71. There is a xml called fl256 for development.
IF you use it for another device make sure you have this line in your xml.
<SPIFlash>1</SPIFlash>
This is using algorithm for larger than 16M SPI flash. (4 bytes address mode).

babba · Post by **babba** » Mon Sep 08, 2014 4:11 pm

Copyright (C) 2010-2015
USB JTAG NT 0.71
Target: 25FL256
-flshdct 0
Found Address= 00000000 FL256SAIF00

Thanks alot usbbdm

babba · Post by **babba** » Mon Sep 08, 2014 4:13 pm

Dumping the factkey is enough for me now , lifesaver hehe

babba · Post by **babba** » Mon Oct 06, 2014 5:04 am

usbbdm ,

Could you finish the xml for this modem ? i have a full dump here from my isp
I just dont have the skills to use the adresses where firmwares start or end

Image0 image1 etc..

Thx you

XML Request Cisco EPC3928 AD

XML Request Cisco EPC3928 AD

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